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No large published human clinical trials exist as of 2026 for any form
At first, I found the twisting and contorting in front of a full length mirror while fumbling with a syringe and needle was like playing the game Twister with a sharp object in a carnival funhouse
However, Lacto-Ovo vegetarians who consume dairy and eggs typically get enough B12 from these animal-derived foods
While some patients have reported weight loss, these effects vary from person to person and are not guaranteed
Too much vitamin B12 intake can cause headache, nausea and vomiting, diarrhea, fatigue, weakness, and tingling
In people with normal absorption, deficiencies have been reported only in strict vegetarians who consume no products of animal origin (including no milk products or eggs)
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